CVE-2025-21768

MEDIUM

5.5

Description

In the Linux kernel, the following vulnerability has been resolved: net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels Some lwtunnels have a dst cache for post-transformation dst. If the packet destination did not change we may end up recording a reference to the lwtunnel in its own cache, and the lwtunnel state will never be freed. Discovered by the ioam6.sh test, kmemleak was recently fixed to catch per-cpu memory leaks. I'm not sure if rpl and seg6 can actually hit this, but in principle I don't see why not.

Details CVE

Score CVSS v3.15.5

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Vecteur d'attaqueLOCAL

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie2/27/2025

Derniere modification10/28/2025

Sourcenvd

Observations honeypot0

Produits affectes

linux:linux_kernel

Faiblesses (CWE)

CWE-401

References

https://git.kernel.org/stable/c/4c0f200c7d06fedddde82209c099014d63f4a6c0(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/5ab11a4e219e93b8b31a27f8ec98d42afadd8b7a(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/92191dd1073088753821b862b791dcc83e558e07(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Correlations IOC

Aucune correlation enregistree

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